20m^2蒸发池水体冻结特征分析

Study on Freeze Characteristic of Water in 20m^2 Evaporation Pool

对4年20m2蒸发池无积雪覆盖条件下的冰期试验资料分析表明:日平均气温稳定低于-2.8℃是冰期稳定冻结的开始,冰期冻结厚度与-2.8℃的积温有密切的关系。冰体年最大冻结厚度与积温、冻结历时天数呈线性关系;冻结厚度与负积温有相关性很好的“s”形曲线关系。

Four years freeze data in 20m2 evaporation pool show that air temperature steadily under -2.8℃is necessary initial condition for steady freeze of water in 20m2 evaporation pool, there is an obvious relationship between freeze depth and air temperature. Air temperature controls freeze depth. Maximum depth has linear relationship with its accumulative temperature and days of freeze.Relationship between freeze depth and its minus accumulative temperature have a ' S ' type curve.The ' S ' type curve could be used to forecast freeze depth.